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One little appreciated fact is that some chains elongate very little and show little increase in length (pitch), but plenty of roller and side clearance wear. A Campy 10 chain that I deliberately used for 6,000 miles did this and wore out the two most used sprockets.
Elongation wasn't even 0.25%, but roller and side wear was huge. Most of the roller wear was on the hole in the roller.
AXS users are seeing the same thing. They see little elongation and don't change a chain, then find worn out sprockets when a new chain is installed. I keep at least 4 chains in a rotation per cassette, so I'll never have new-chain skip.
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